Benjamin p



y JosLYN.

WRENCH.

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` lUNITED STATES PATENT FEICE.

BENJAMIN F. JOSLYN, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO RICHARD 1?.-BRUFF, OF YORK CITY.

IMPROVEMENT IN WRENCHE Specification forming part of Leiters Patent No. 180,341.8, dated July 25, 1876; ap'dication Iiled February 2S, 1876.

To all whom it may concern:

Be it known that I, BENJAMIN F. JosLYN,

-ot' IfVorcester, Massachusetts, have invented an Improved Wrench, of which the following; is a specification:

, ject I attain in' the manner which I will new proceed to describe., reference being had to the accompan-ying),l drawing, in whichl Figure l is a side view ot' my improved wrench; Fig'. 2, a. sectional view, and Fig. 8 a transverse section on the line l 2. A is the stem of the wrench; B, the fixed jaw, and D3 the movable jaw. A screw, E, tits snugly in a groove in the stem A, and has the usual serrated enlargement, d, adapted to a recess in the said stem, and ajonrnal adapted to aprojectioinf, secured to or forming' a part ot' the stem. The thread ot' the screw E is inclined on one side, and abrupt on the other, and receives threads, or rather teeth, ot' a similar character in a yoke, G, which embraces the stein, as shown in Fig. 3, and aprojeetion, a, tits snugly, but so as to move freely, in a cess in the movable jaw, and is pivoted to the same at a', a pin, I), and spring d, the latter being contained in a recess in the yoke, tending` to maintain the same in the position shown in Fig. l, where the teeth of the yoke are in gear'with the thread of the screw.

By forcing the yoke in the direction of the arrow, Fig. 2, it will turn on its pivot, and its teeth will be moved out of gear with and be yond the control of the screw, and the jaw will consequently be at liberty, and can be quickly moved ou the stem to any desired position; but when pressure .is removed from the yoke the spring d will restore it to its original position, Fig. 1, and itsteeth will be in gear with the thread ot' the screw, by manipulating which the jaw can be. slowly and accurately adjusted.

I wish it to be understood that I do not de- BENJAMIN F. JOSLYN.

Witnesses: I

H AERY HowsoN, Jr., HARRY SMITH. 

